Teat-cup.



L. BULL.

TEAT CUP.

APPLICATION FILED APR.24| 1914.

Patented June 29, 1915.

9 MW F m j "I I L- a To all whom it may concern:

LIonnL BULL, or CHICAGO, ILLINOIS.

'rEA'r-cUr.

Specification of Letters Patent. v Patented June 29, 1915.

Application filed Apri124, 1914. Serial No. 834,077.

Be it known that I, LIONEL BULn, a. subject of the King of England,residmg at Chicago, in the county of Cook and State of'Illinois, haveinvented new and useful Improvements in Teat-Cups, of which the Theobject of my invention is to provide a tube that will be simple andeconomical in construction, and be-easy to keep in a. perfectly cleanand sanitary condition, substantially as hereinafter fully described,and as particularly pointed out in the claims.

In the drawings, Figure 1 is a side view of my improved teat-cup. Fig. 2is a vertical central section thereof. Fig. 3 is a transverse sectiontaken on dotted line 83, Fi 2.

In the drawings, A represents the tubular metal casing of the tea'tcup.This casing tapers slightly from its upper wider end to its lowernarrower end,'and its upper end a is exteriorly threaded and madethicker to" narrow the entrance to'the bore thereof and to widen theupper edge of the same, so as to provide a broad bearing surface for theoutwardly flaring circumferential flange projecting from the upper endI) of a cylindrical rubber tube B. This tube B is open at both ends andis of a diameter less than the upper end or mouth of the bore of casingA, and is of such length that its lower end extends down through and outof the lower or dischar e end of the casing, and said tube 13 secured ina position concentrlc to the axis of the casingby means of an annularcap C which is screwed down over the upper end thereof and has aninwardly pro- 'thercof thicker.

j ecting flange o that provides an inner shoulder that-engages theflange b of the tube and clamps the. same against the broader edge ofthe upper end of the casing sufii- Cleilltly tight to makethe joint airand water tig t. I

The bore of the lower end of easing A is restricted by -making theannular walls At one side of this lower annular edge it is provided witha stub D which has a nipple d inserted longitudinally into a suitableopening in the end thereof,

which nipple communicates with the annularchamber around tube B andconnects] the same to the adjacent endof a flexible pipe of a pulsator(not shown).

I insert in-the lower end of'the elastic tube 13 the widened upper end 6of another nipple E, and the diameter of this wider upper portion 6 issuch as to make it necessary to distend the lower end of tube B to suchan extent as to engage the inner circume ference ofthe lower end of thebore of the casing A, and seal the same so as to make an air tight jointfor the annular chamber between the tube B and the casing A,substantially as shown in the drawings.

The mouth or upper end of the tube B is,

apron E, which extends from the inner angle of the mouth of the tube atthe point where the upper surface of the flange meets the same down intothe bore of the tube a. short distance, substantially as shown in thedrawings.

In operation, the teat of the cow is inserted down through the centralopening of the cap G into the bore of the elastic tube B which willstretch suflicient to accommodate the same. The pulsator of the milkingmachine isthen put in operation and the annular chamber between casing Aand the outer circumference of said tube is'alternately exhausted andcharged by the introduction of more air therein; in other words,

an alternate condition of vacuum and pie num is created in this annularchamber which causes the tube B to be compressed so as to compress theteat of the cow and then to expand to its normal circumference so as tosuck the milk from the cow, substantially in the same manner asnowmanipulated by hand.

A teat-cup for a milking machine comprising an elastic cylindrical tubemade open at its ends and having a funnel shaped preferably, providedwith a funnel-shaped apron extending into the mouth of the same Inwnness whereof I have hereunto set n'ndhaving a circumfeyential endflange pl'o- .m hand this 15th day 0 Apnl, 1914. 1ect1ng thvlsefrorn, ahollow metal casing; T 1 T through whlch szud tube extends, and meansL10) 4 BL engaging the ends of smd tube, that attach VIIZTIGSSPS:

the ends of send tube to the ends of said 'Fnmn; D.THO1\IASON,

casing. FLORENCE MITCHELL.

